Glare Effect has a lot of "BUGS"

[XavBo]

Hello Guys!

After I didn't received any comment or eMail from Chaos Group regarding my problem I took a loooooooot of effort to find out what is wrong and what doesnt work properly.
You can have a look under:

http://www.class-a-strak.com/videos_...5___Part_2.mp4

This is really bad.

1. The Glare Effect went somehow broken. Have a look in the video.

2. The RectLight by using Textures doesn't work properly.

3. All the Glares have the same size WHICH this can be possible.
Example:
http://www.class-a-strak.com/videos_..._EXAMPLE_1.png

4. If the RectLight has a huge amount of intensity this will broke in a high reflective materials (Like chrome etc...)

5. Image "alphas" are not supported for the RectLight->Text
You will get a estrange blue color where the alpha is applied.

6. The RectLight-Texture make all black by using a normal png image. You can see that in the video. Where suppose to be a sun glare you will get the glare and added to the render (depends on your RectLight Type (Rect) (Circular)) you will get a black area.

7. By using a background I got really estrange yellow glitches.
How to solve that. That part I couldnt solve yet.
Im using a 8bit png image for the background in the VFB.

The Glare and Bloom should be improved a lot.
Specially the glare effect.


IDEAS from my side.
A great idea after correcting all the BUGS is to add an animation for the selected Image under "Glare Effect->Type->From an Image
This will help the sun glare on the surfaces having at the end an effect of the sun glare as when you move the camera.

When you move around a car the glare on the surfaces looks like they rotate. That effect can be add under RectLight->Texture->Use Rect Tex-ImageSeq (for example) or adding an expression.



@yolov
@Zdravko.Keremidchiev

I will send you more videos how I solved the problem that I get on the VFB everytime and I will send you the other way I solved the problem.I think one way to solved the problem will be fine enough.

I wish really that this Glare and Bloom Effects which are extremely great can be improved more.
I love the thing that is already build, because this can help me to understand or render into a pass my glare effect for post production.

[Zdravko.Keremidchiev]

1. The Glare Effect went somehow broken. Have a look in the video.

This is a known issue when you have "Forces color clamping" button in the VFB disabled. It is fixed in V-Ray Next.

2. The RectLight by using Textures doesn't work properly.

What texture format are you using? Have you set Rec Tex A to 0?

3. All the Glares have the same size WHICH this can be possible.

The size of the glare will depend on the intensity of the light. In the image the brighter the light is the stronger the effect. In the example, the windows glare effect looks larger than the other two.

4. If the RectLight has a huge amount of intensity this will broke in a high reflective materials (Like chrome etc...)

Does this issue persist if you enable " Forces color clamping" button in the VFB?

5. Image "alphas" are not supported for the RectLight->Text
You will get a estrange blue color where the alpha is applied.

This is also due to the usage of .tif images with alpha channel. As a workaround try using .png images instead. I 've already reported that one.

6. The RectLight-Texture make all black by using a normal png image. You can see that in the video. Where suppose to be a sun glare you will get the glare and added to the render (depends on your RectLight Type (Rect) (Circular)) you will get a black area.

Have you set Rec Tex A to 0? Can you attach an example scene?

7. By using a background I got really estrange yellow glitches.
How to solve that. That part I couldnt solve yet.
Im using a 8bit png image for the background in the VFB.

Can you share a scene or some screenshots?

[Zdravko.Keremidchiev]

Also keep in mind that we have reworked our Lens effects for V-Ray Next with totally different approach. Now they have much better control and quality.
https://docs.chaosgroup.com/display/...A/Lens+Effects

[seandunderdale]

Agreed. The lens and glare tools are totally different and a pleasure to work with in Vray Next. I suggest either upgrading or at least trying the demo to see how many issues it fixes. I never used the previous tools in production, but I absolutely love them now.

[XavBo]

1. This is a known issue when you have "Forces color clamping" button in the VFB disabled. It is fixed in V-Ray Next.

I actually didn't have the "Forces Color Clamping" on.
It just came like this and then I found out that I need press the "Forces Color Clamping" then the problem was gone.

2. What texture format are you using? Have you set Rec Tex A to 0?

I tried everything.
With Alphas:
TIFF
PNG
TARGA

Without alphas:
JPG
PNG
TIFF
TARGA

All in:
8, 26, 32 bit
I tried everything and nothing helped me.

3. The size of the glare will depend on the intensity of the light. In the image the brighter the light is the stronger the effect. In the example, the windows glare effect looks larger than the other two

Well then we have a huge problem, because if I go over the intensity of 6 dell will blow all the my materials.
I will post some examples.
Also videos so you can see the whole problem.

4. Does this issue persist if you enable " Forces color clamping" button in the VFB?

No. Once I active the "Forces Color Clamping" the Glares" will appear correctly.
If I deactivate again the "Forces Color Clamping" the the Glare Effect Behavior will be present again.
This work around is not easy to find it.
Who will know that by pressing a "Forces Color Clamping" button then the Glares Problem will not appear again.
There is nothing on the web about this and I just find this by my self, but too long time to find out how to solve.

5. You will get a estrange blue color where the alpha is applied.
This is also due to the usage of .tif images with alpha channel. As a workaround try using .png images instead. I 've already reported that one.

The problem is that I used also .png and I became also the same problem.
I didn't test anymore, because I had so many issues to solve and I need also to finish the project.

6. Have you set Rec Tex A to 0? Can you attach an example scene?

Nop. I will test that one.
I will need to read more about that
Thank you for the typ and I will tell you the result.

7. Can you share a scene or some screenshots?

I already sent to you the scene twice to the support eMail and one to @yolov (or twice too? Dont remember)

[XavBo]

Agreed. The lens and glare tools are totally different and a pleasure to work with in Vray Next. I suggest either upgrading or at least trying the demo to see how many issues it fixes. I never used the previous tools in production, but I absolutely love them now.

Thank you for sharing your thoughts on this topic.
Pretty HOT topic for me.
When I saw the first time the MaYa the bloom and glare coming I got in love.
Took a long long long time to be in MaYa.
3Ds Max has already long time ago

I will try the vRay NEXT now

[XavBo]

BTW.
Is there a way to disconnect the objects being affected by the Sky Dome?
When you have the Sky Dome the Glare Effect change a lot.

If I unlink the Sky Dome from my objects in the Light Linking Window - then Sky Dome will not have the desired result.

Any suggestions?

[Zdravko.Keremidchiev]

I actually didn't have the "Forces Color Clamping" on.

Once I active the "Forces Color Clamping" the Glares" will appear correctly.

This option is on by default. If you make a new scene and do a quick render the option should be enabled. If it was disabled in your scene, someone should have switched it off by mistake or just by testing something.

Who will know that by pressing a "Forces Color Clamping" button then the Glares Problem will not appear again.
There is nothing on the web about this and I just find this by my self, but too long time to find out how to solve.

The Glare - Forces Color Clamping issue was a bug on our side which is already fixed in V-RayNext. We apologize for the inconvenience caused.

All in:
8, 26, 32 bit
I tried everything and nothing helped me.

png with alpha seems to work fine on my side, here is an example scene: https://drive.google.com/a/chaosgrou...ew?usp=sharing
In case you want to achieve the effect with maps that don't have Alpha you need to map the "Rec Tex A" as well: https://drive.google.com/a/chaosgrou...ew?usp=sharing

Well then we have a huge problem, because if I go over the intensity of 6 dell will blow all the my materials.
I will post some examples.
Also videos so you can see the whole problem.

The glare effect is very similar to the real camera one. Can you just diminish de glare effect? Please send us some examples.

Is there a way to disconnect the objects being affected by the Sky Dome?

VRayLens effects take information from the brightness of the pixel on the output image. It can't ignore certain light that contributes to the overall lighting of the scene. But you can't try to increase the threshold which will determine the level of intensity from which the lens effect to apply.

[XavBo]

Hi Zdravko,
I will have a look during this week.

I have a lot to do and I couldn't make any test.

Thank you for your replies